And by coach i mean someone who is there to support you throughout the preparation for your dive on the dive day and the dive, and just after it. A coach is someone who will keep track of the time, knowing when you can enter the water so you're not breaking the rules, when you can start your warm-up dive so you're not breaking the rules, they know when to start getting you ready to take you over to the competition line, they can help you clip into the competition line, they can use humor to help make you relax or motivational words so that to help you believe in yourself, and most importantly at the end of the dive, as you come back up to the surface, they will remind you in a very clear loud voice, saying your name, to do proper recovery breaths and to do the surface protocol in the correct order. Sometimes at the end of a dive it's really easy to get muddled or do things that you wouldn't normally do, so having that someone there shouting your name and shouting at you to breathe, to do your hook breathing, to do the correct surface protocol, is really useful. Get yourself a coach and if you have a bit of time practice with them for at least a session beforehand.